Controller for radio receiving sets



eb 2.2 1927 A. c. MccANE CONTROLLER Fon RADIO xcmvma sms -Fi-led Aug. 3o. 1922 ATTORN EY UNITED STATES hanna Fei.4 22, 1927. I,

PATENT OFFICE.

AMES C. MCCANE,OF SEATTLE, WASHINGTON.

CONTROLLER FOR RADIO RECEIVING SETS.

Application led August 30, 1922. Serial No. 585,247.

lused instead of what is conventionally known as jack`systems.hitherto inuse.

. The lnventlon consists 1n the novel con- "struction, adaptation, and combination of parts in a multiple switch including a rotatable Contact member which may be used Selectivelywith respect to -any of the electrical circuits of a radio receiving set.

In the accompanying drawings, Figure 1 is a rear elevational view of a i switch-board provided with devices embodying my invention, the circuit connections being shown diagrammatically. Fig. 2 is a sectional view taken substantially through 2-2 of Fig. 1; andFig. 3 is a front elevation of the switch-board illustrated in the preceding views.

The body7 50i the switch-board may be of any'suitable'material and in which is jour` naled the pivot shaft 6 of the movable switch member in the nature of a lever7 located at therear of the board and controlled as by means of a knob 8 secured to the end of the shaft in front of the board. Said lever 'lever 7, `said conductor 18 includes a coiled is v formed of any suitable non-conducting material and is provided at one side of its axis with a sector shaped arm 9 and at its other side with a relatively narrow arm 10. Secured to the opposite faces of the lever arm 9 are joined metal bridge contact elements 11. Secured to the inner and outer faces respectively of thev lever'. arm 10 and protruding .therefrom are contacts 12 and 13 which constitute parts of the receiver connections, so called, of a radio a paratus. The lead.wire 14 of one of sai receiver connections is connected by a conductor 15 and the shaft 6 with the contact 13. The lead 16 ofthe other of said receiver connections is connected by conductors 17 and 18 with the contact12.

I To accommodate rotary movement of the -portion181 (Fig. 2) extending about said shaft and separated therefrom by means of insulating sleeve 19.

Arranged substantially as shown in Fig. 1 and concentrically of the switch axis to be in engageable relations with the contacts 12 and 13 are pairs of contacts 20, 21 and 22 which are respectively connected to the lead wires 201, 211 and 221 of No. 2 amplifier, No. 1 amplifier, and detector circuits.

The complementary elements of the respective pairs of contacts 20, 21 and 22, as illustrated, are held in approximately the spaced relations in 'hich they are shown with respect to each other by means of insulating blocks such as 23 and supporting posts 24.

At the opposite side of. the switch axis from the contacts 20, 21 and 23, is provided an insulating block 25 having secured tothe inner side thereof a Contact 26 for the lead 261 of a battery connection. Secured'to the other side of this block and in comp'lementary relations with the contact 26 is the contact 27 for the lead wire 271 of lthe detector filament. Also secured to the block 25 and in spaced relations concentrically' of the switchaxis are contacts 28 and 29 for the lead wires 281 and 291 respectively of the filaments of Nos. and 2 amplifier circuits. The contacts 26, 27, 28 and 29 areiarranged substantially as shown for engagement with respect to the bridge contacts 11 and also with respect to the contacts 20, 21 and 22.

30 represents a pointer provided on the shaft 6 for indicating with res ect to reference characterssuch as 0 1 v2 3 0, for example-provided on the front face of the switchboard the positions of the movable contacts 12 and 13 with respect to the stationary contacts 20, 21 and 22 whereby dif,-

ferent adjustments or the connections of the radio circuits may. be elected predetermithe movable contacts 12 and l13 toclose the gaf) between contacts 29 and conductors 15 and 17, simultaneously, with the bridge con-v tacts 11 being brought in electrical connection with the contacts 26 to 29 inclusive.

By turning the knob to have the inter 30 register with indicating number 2, the

lever is brought into position to cut out the No.2 amplifier contacts 20 and 29 and ail'ord electrical connections between the No. 1 ampliier contacts 21 and conductors 15 and 17 and also between the contacts- 26 and 27. The bridge 11 now serves to connect the bw tery contact 26 with the contacts 27 and 28 of the detector and the No. 1 amplifier filament, respectively. By turning the pointer into register with the indicating character l, only the' contacts 22 remain in connection with the conductors 15 and 17; the battery and detector contacts 26 and 27, respectively, remain in electrically` but the amplilier contacts are cut out of circuit.

By bringing the pointer out of register with any of the characters l 2 and 3 as into register with either of the 0, :for

example, all of the circuit connections are v ra io panel, a shaft rotatably carried by the base, a rotatable insulating member carried by the shaft and formed with radially projecting arms, contacts projecting in spaced relations from opposite faces of one arm and insulated from each other, contact bridge plates mounted on the remaining arm, a pan' of oye'rlying spaced contacts outwardly ex tended from said support by means of bolts passing through the spaced contacts terminating in the unit base and spacing studs inv terposed between theunit base and spaced;

'means for operating said member for shifting its arms in respect -to said pairs of spaced contacts.

Signed at Seattle, Washington, this 11th day of August, 1922.

AMES C. MCCANE. 

